Copula-Probabilistic Flood Risk Analysis with an Hourly Flood Monitoring Index
Article
Article Title | Copula-Probabilistic Flood Risk Analysis with an Hourly Flood Monitoring Index |
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Article Category | Article |
Authors | Chand, Ravinesh, Nguyen-Huy, Thong, Deo, Ravinesh C., Ghimire, Sujan, Ali, Mumtaz and Ghahramani, Afshin |
Journal Title | Water |
Journal Citation | 16 (11) |
Article Number | 1560 |
Number of Pages | 27 |
Year | 2024 |
Publisher | MDPI AG |
Place of Publication | Switzerland |
ISSN | 2073-4441 |
Digital Object Identifier (DOI) | https://doi.org/10.3390/w16111560 |
Web Address (URL) | https://www.mdpi.com/2073-4441/16/11/1560 |
Abstract | Floods are a common natural disaster whose severity in terms of duration, water resource volume, peak, and accumulated rainfall-based damage is likely to differ significantly for different geographical regions. In this paper, we first propose a novel hourly flood index (πππ πΌ24ββπβπ) derived from normalising the existing 24-hourly water resources index (ππ πΌ24ββπβπ) in the literature to monitor flood risk on an hourly scale. The proposed πππ πΌ24ββπβπ is adopted to identify a flood situation and derive its characteristics, such as the duration (D), volume (V), and peak (Q). The comprehensive result analysis establishes the practical utility of πππ πΌ24ββπβπ in identifying flood situations at seven study sites in Fiji between 2014 and 2018 and deriving their characteristics (i.e., D, V, and Q). Secondly, this study develops a vine copula-probabilistic risk analysis system that models the joint distribution of flood characteristics (i.e., D, V, and Q) to extract their joint exceedance probability for the seven study sites in Fiji, enabling probabilistic flood risk assessment. The vine copula approach, particularly suited to Fijiβs study sites, introduces a novel probabilistic framework for flood risk assessment. The results show moderate differences in the spatial patterns of joint exceedance probability of flood characteristics in different combination scenarios generated by the proposed vine copula approach. In the worst-case scenario, the probability of any flood event occurring where the flood volume, peak, and duration are likely to exceed the 95th-quantile value (representing an extreme flood event) is found to be less than 5% for all study sites. The proposed hourly flood index and the vine copula approach can be feasible and cost-effective tools for flood risk monitoring and assessment. The methodologies proposed in this study can be applied to other data-scarce regions where only rainfall data are available, offering crucial information for flood risk monitoring and assessment and for the development of effective mitigation strategies. |
Keywords | flood characteristics; vine copulas; risk mitigation; joint distribution; flood monitoring; hourly flood index |
Related Output | |
Is part of | Artificial Intelligence and Copula-Probabilistic Models for Early Flood Warning and Community Risk Management: Case Studies in Fiji Islands |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 460207. Modelling and simulation |
Public Notes | This article is part of a UniSQ Thesis by publication. See Related Output. |
Byline Affiliations | School of Mathematics, Physics and Computing |
Centre for Applied Climate Sciences | |
Thanh Do University, Vietnam | |
Al-Ayen University, Iraq | |
UniSQ College | |
University of Southern Queensland |
https://research.usq.edu.au/item/z7640/copula-probabilistic-flood-risk-analysis-with-an-hourly-flood-monitoring-index
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Copula-Probabilistic Flood Risk Analysis with Hourly Flood Monitoring Index_proofread_completed.pdf | ||
License: CC BY 4.0 | ||
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